X-ray Absorption Spectroscopy Investigation of Platinum-Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction

被引：3

作者：

Jensen, Kim Degn ^{[1
,2
]}

Pedersen, Anders Filsoe ^{[2
]}

Zamburlini, Eleonora ^{[2
]}

Stephens, Ifan Erfyl Lester ^{[2
,3
]}

Chorkendorff, Ib ^{[2
]}

Escudero-Escribano, Maria ^{[1
,2
]}

机构：

[1] Univ Copenhagen, Nanosci Ctr, Dept Chem, Univ Pk 5, DK-2100 Copenhagen O, Denmark

[2] Tech Univ Denmark, Dept Phys Surface Phys & Catalysis, DK-2800 Lyngby, Denmark

[3] Imperial Coll London, Royal Sch Mines, Dept Mat, 2-03b,Prince Consort Rd, London SW7 2AZ, England

来源：

CATALYSTS | 2020年 / 10卷 / 09期

关键词：

X-ray absorption spectroscopy; electrocatalysis; Pt alloys; thin films; co-sputter deposition; oxygen reduction reaction; FUEL-CELLS; ELECTROREDUCTION; ELECTRODE; ELECTROCATALYSTS; BENCHMARKING; PERFORMANCE; CHALLENGE; OXIDATION; CATALYSTS; MEMBRANE;

D O I：

10.3390/catal10090978

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Alloys of platinum and lanthanides present a remarkable activity for the oxygen reduction reaction-both in the form of extended surfaces and nanoparticulate catalysts. Co-sputter-deposited thin film catalysts based on platinum and gadolinium show great oxygen reduction activity improvement over pure Pt. The sputter-deposition technique represents a viable and versatile approach for investigating model catalyst systems with different compositions. In this work, co-sputtered Pt5Gd and Pt7.5Gd thin films were investigated using X-ray absorption spectroscopy as well as standardized electrochemical techniques. These investigations revealed the importance of forming alloys with specific stoichiometry, supporting the need of forming compressively strained Pt overlayers in order to achieve optimum catalytic performances.

引用

页码：1 / 12

页数：12

共 53 条

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